Now showing items 1-9 of 1

    Archean - unnamed strata (1)
    Carboniferous - Badito formation (1)
    Cretaceous - Laramie formation; Trinidads formation; Pierre shale; Apishapa formation; Timpas formation; Carlile shale; Greenhorn limestone; Graneros shale; Dakota sandstone (1)
    Geology -- United States --Maps (1)
    Geology--Colorado--Huerfano County--Maps (1)
    Jurassic - Morrison formation (1)
    Neogene - Silver Mt. monzonite-porphyry; Nussbaum formation (1)
    Paleogene - Silver Mt. monzonite-porphyry; Cuchara formation; Poison Canyon formation (1)
    Triassic - Morrison formation (1)